random_censoring_exp {SimNPH}

Apply Random Exponentially Distributed Censoring

Description

Apply Random Exponentially Distributed Censoring

Usage

random_censoring_exp(dat, rate, discrete = TRUE)

Arguments

dat

the dataset to apply the random censoring to

rate

time of end of enrollment

discrete

should the censoring times be rounded to whole days?

Value

Returns a Function with one argument dat that modifies a dataset generated by the generate functions by censoring the times and setting the event indicator to FALSE for censored observations.

Examples

one_simulation <- merge(
  assumptions_delayed_effect(),
  design_fixed_followup(),
  by=NULL
) |>
  head(1) |>
  generate_delayed_effect()

# apply censoring to dataset
censored_sim <- random_censoring_exp(one_simulation, 0.01)

# plot
# uncensored (blue) observations are the same for original and modified
# dataset
# censored (red) observations are smaller than the uncensored ones
plot(
  one_simulation$t,
  censored_sim$t,
  col=ifelse(censored_sim$evt, "blue", "red"),
  xlab = "uncensored times",
  ylab = "censored times"
)
abline(0,1)